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TXP(4) FreeBSD Kernel Interfaces Manual TXP(4)
NAMEtxp -- 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface
SYNOPSISdevicetxpDESCRIPTION
The txp interface provides access to the 10Mb/s and 100Mb/s Ethernet net-
works via the 3Com Typhoon/Sidewinder chipset. This driver supports the
following cards:
+o 3Com 3CR990-TX-95
+o 3Com 3CR990-TX-97
+o 3Com 3cR990B-TXM
+o 3Com 3CR990SVR95
+o 3Com 3CR990SVR97
+o 3Com 3cR990B-SRV
Basic Ethernet functions are provided as well as support for vlan(4) tag
removal and insertion assistance, receive ip(4), tcp(4), and udp(4)
checksum offloading, and transmit ip(4) checksum offloading. There is
currently no support for transmit tcp(4) or udp(4) checksum offloading,
tcp(4) segmentation, nor ipsec(4) acceleration. Note that hardware
checksumming is only used when the interface is not in bridge(4) mode.
Each of the host's network addresses is specified at boot time with an
SIOCSIFADDR ioctl(2). The txp interface employs the address resolution
protocol described in arp(4) to dynamically map between Internet and Eth-
ernet addresses on the local network.
When a txp interface is brought up, by default, it will attempt to auto-
negotiate the link speed and duplex mode. The speeds, in order of
attempt, are: 100Mb/s Full Duplex, 100Mb/s Half Duplex, 10 Mb/s Full
Duplex, and 10 Mb/s Half Duplex.
The txp supports several media types, which are selected via the
ifconfig(8) command. The supported media types are:
mediaautoselect
Attempt to autoselect the media type (default)
media100baseTXmediaoptfull-duplex
Use 100baseTX, full duplex
media100baseTX [mediaopthalf-duplex]
Use 100baseTX, half duplex
media10baseTmediaoptfull-duplex
Use 10baseT, full duplex
media10baseT [mediaopthalf-duplex]
Use 10baseT, half duplex
SEE ALSOarp(4), ifmedia(4), inet(4), intro(4), ip(4), tcp(4), udp(4), vlan(4),
ifconfig(8)HISTORY
The txp driver first appeared in OpenBSD 2.9.
FreeBSD 10.1 April 15, 2001 FreeBSD 10.1